Abstract

A link indication represents information provided by the link layer to
higher layers regarding the state of the link. This document
describes the role of link indications within the Internet
architecture. While the judicious use of link indications can provide
performance benefits, inappropriate use can degrade both robustness
and performance. This document summarizes current proposals, describes
the architectural issues, and provides examples of appropriate and
inappropriate uses of link indications. This memo provides information for the Internet community.